export default {
  /** 省份校验 */
  checkProv(val) {
    const pattern = /^[1-9][0-9]/;
    const provs = { 11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江 ", 31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北 ", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏 ", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门" };

    return pattern.test(val) && !!provs[val]
  },
  /** 出生日期校验 */
  checkDate(val) {
    const pattern = /^(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)$/;
    if (pattern.test(val)) {
      const year = val.substring(0, 4);
      const month = val.substring(4, 6);
      const date = val.substring(6, 8);
      const date2 = new Date(year + "-" + month + "-" + date);
      return date2 && date2.getMonth() == (parseInt(month) - 1)
    }
    return false;
  },
  /** (机构、性别、校验码)校验 */
  checkCode(val) {
    const p = /^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))(([0-2][1-9])|10|20|30|31)\d{3}[0-9Xx]$/;
    const factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
    const parity = [1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2];
    const code = val.substring(17);
    if (p.test(val)) {
      let sum = 0;
      for (let i = 0; i < 17; i++) {
        sum += val[i] * factor[i];
      }

      return parity[sum % 11] == code.toUpperCase()
    }
    return false;
  }
}